The correct answer is B.
The New Deal was the package of measures that the US implemented as a response to the Great Depression and its consequences. The whole plan was based on Keynesian economic principles, and used the fiscal policy tools, more specifically increases in public spending, to boost the aggregate demand leves and, in turn, economic growth.
This increase in public spending was mostly directed to programs of public works, where unemployed people would get a job. This measure directly controls the amount producers. Previously unemployed people will start to earn a salary and demand goods, which will increase the aggregate demand even further and generate more growth.
